diff --git a/web/src/pages/proposals/form/ProposalFormPage.tsx b/web/src/pages/proposals/form/ProposalFormPage.tsx
index a18f5e1..5e8a3d5 100644
--- a/web/src/pages/proposals/form/ProposalFormPage.tsx
+++ b/web/src/pages/proposals/form/ProposalFormPage.tsx
@@ -130,7 +130,12 @@ export default function ProposalFormPage() {
                   options={customers}
                   getOptionLabel={(opt) => (typeof opt === 'string' ? opt : opt.name)}
                   loading={customerLoading}
-                  onInputChange={(_, value) => searchCustomers(value)}
+                  onInputChange={(_, value, reason) => {
+                    if (reason === 'input') {
+                      handleChange('customerName', value);
+                    }
+                    searchCustomers(value);
+                  }}
                   onChange={handleCustomerSelect}
                   renderInput={(params) => (
                     <TextField